It's the dual-core Samsung Exynos 5 that can be clocked up to 1.7Ghz with the quad-core Mali-T604 GPU. Zach Honig of Engadget writes:

ARM says its working with eight manufacturers to get the licensed tech to market as early as Q3

I think the word "market" is meant as the B2B market not yet the B2C one. I don't think they mean consumers can buy ARM Cortex-A15 with Mali-T604 in devices already in Q3, I think they probably mean that manufacturers can buy early samples of Exynos5 with Mali-T604 in Q3 and more likely start selling mass produced devices to consumers not before next year. But who knows? Could Mali-T604 be ready to ship in ARM devices before the end of the year already?

Samsung Exynos 5, and it´s similar SoC:s with Cortex A15 and Mali-gpu processers will of course forthcoming year be a competitive processor concept to Intels processors.

ARMs Mali gpu-processors will make it together with integrated basebands dsp and rf-asic
for LTE-mobile standards extreme low Latency make it possible to play Online game competitive
with fixed broadband for Online game playing.